Calculate percentages, percentage changes, discounts, markups, and tax instantly.
e.g. a 15% tip on 80
Percentage calculations are fundamental to everyday math: calculating discounts while shopping, determining tip amounts, understanding test scores, computing tax, calculating interest, and analyzing data. The Percentage Calculator handles all common percentage scenarios instantly. Percentage calculations often confuse people because they can be framed multiple ways. "25% off" means different amounts depending on the original price. "Price increased by 20%" is different from "new price is 120% of original." The tool clarifies these calculations instantly. Our Percentage Calculator handles: what is X% of Y? (computing a percentage of a value), X is what % of Y? (finding what percentage one value is of another), percentage change (how much did a value increase or decrease?), discount calculation (what's the sale price after discount?), markup calculation (what price results in desired profit margin?), and tax calculation. Shoppers use it for discount calculation ("What's 30% off $50?"). Tippers use it for tip calculation ("15% tip on $42 bill?"). Investors use it for return calculation. Business people use it for markup calculation. Teachers use it to calculate percentage grades. Analysts use it for data analysis and trends. Enter known values and the calculator shows all related percentages and calculations. Real-time calculation as you type.
15-20% is standard. Multiply bill amount by tip percentage (0.15 to 0.20) for tip amount.
Markup is profit as a percentage of cost. Margin is profit as a percentage of selling price. They're different!
(New Value - Old Value) / Old Value × 100 = Percent Change. Positive is increase; negative is decrease.
Yes, apply discounts sequentially or multiply discount percentages for combined effect.